Doffing apparatus for spinning and twisting machines



-F. GRAF. DOFFING APPARATUS FOR SPINNING AND TWISTING MACHINES.

APPLICATION FILED 050.22, 1919.

1,384,449, Patented July 12,1921. I

4 ,SHEETS-SHEET l.

v (A 7 R INVENTOR H/J ATTORNEY F. GRAF. DOFFING APPARATUS FOR SPINNING AND TWISTING MACHINES. APPLICATION FILED DEC.22, 1919.

1,384,449. Paitented July 12,1921.

4 SHEETS-SHEET 2.

INVENTC'R FRED/rm GRHF, I

F. GRAF.

' DOFFING APPARATUS FOR SPINNING AND TWISTING MACHINES.

- APPLICATION {H -ED DEC .22, 1919. 1,384,449,

Patented July 12, 1921.

4 SHEETS-SHEET 3.

15 A rramvsy F. GRAF.

DO FFING APPARATUS FOR SPINNING AND T WISTING MACHINES. APPLICATION FILED DEC.22, 19l9.-

1,384,449. I Patented July 12, 1921.

4- $HEETS-SHEET 4.

IN YEN 7w? FREDHIK am;

HIS ATTORNEY j a half revo ution, and is again approached to the spindles, and then lowered, when the. empty tubesin the other holders are" B5 .upon-the spindles in order in their turn to tomatic dofling spinning machine, is illustrated in the ,ac-

drawingsn. Figure 1 is a cross UNITED STATES (PATENT- OFFICE.

' FBEDBIK GM, 01 KROKSIQKTT, SWEDEN,

Applitation filed December 22,1918. Serial No. 846,618.

To allwhom it'may concern:

Be ,itknown that I, FREDRIK Gnu, en-

gineer, .a citizen of the Canton of Thurgau,

of The Confederated Swiss Republic, and residing at Krokslatt, Sweden, have invented .oertain new and useful Improvements in Dofiin Apparatus for'Spinning and Twisting ltfachines, of which the following is a specification.

The present invention relates to a device in spinning or twisting machines adapted for the simultaneous removal of all the full bobbins or cops on;the row of spindles on a spindle rail in the machine, and afterward simultaneouslymountin empty tubes or pirns 'in place of the full obb ns. The essential characteristic of the invention is that in front of the row of spindles on either sideof the machine is arranged a shifting apparatus consistingofa rodflwhich can be moved up and down,' rotated, and movedto andfrom the spindles, and which in front 'of each spindle carries two holders, of which the one in one position of the rod is intended for a ful bobbin and the other for an empty tube, with the object that when the empty. tubes mounted on the spindles have been filled with yarn they may be removed from the spindles by the holders on the liftin of the rod, .whereu on the rod is move awa from the-spin les and turned passed be filled withyarn,

A form of construction of the said afiapparatus arranged on. a.

'com nyin sectidiial view of "-.the* machine,

while Fig. 2- is a partia front elevation" of the machine at one end of the same. 3 to 14 show details With reference. Fig. 1, 1 is one of. the- 'two end frame pieces. of the "machine to which the spindlerails 2 are fixed, one. on

ofthe: indle rail-the1e is hinged .to it a 3, w '01: isso arranged that the upper end" of the rod moved outward and again be. carried back into -.its. o ri'ginal 1 1p.

. (as shown at the left in 11 and 14.- On, the rod 3 there idfitted a sleeve a which is threaded on the outside, and so arranged that it can be rotated but not longitudinally displaced upon the rod. The said sleeve 4 is provided with a nut 5, and on its upper end is mounted a bevel gear wheel 6. which meshes with a bevel gear wheel 7 on a shaft '8, which latter ex-- tends from one end frame of the machine to the other, and which ateach end carries, in addition to thewheel 7, also a hand wheel 9. In the upper part of. the machine there is arranged a rotatable shaft '10, Fig. 1, which extends between the two end frame pieces of the machine and is fitted in bear in carried by saidpieces. On each endhof the shaft 10 there is mounted a rate at wheel 11, a hand wheel 12, and also a ro e pulley 13, or the like, from which exten s, as indicated in Fig. 1, to. each side of the machine, a wire rope, link chain, or the like, 14, the other end of which is attached to the frame \work which carries the bevel gearing 6, 7, and the shaft 8 and which has apro ection 1,5, the end 'of which rests a inst a spring 16 on the end frame piece 0 and arts appertaining thereto assume the position shown to the left in Fig. '1. The ropes 14 which run over the guide rollers 17 are so connected to the rope pulley 13 that on the rotation of the. shaft 10 they are simultaneously wound on, or off, the rope pulley and the rods 3 are thus simultaneously either moved into an ulpright position ig. 1 or are lowered outwardl from that position (as shown at the rig t in Fig'. .1 T is out- ;ward movementisstarted by the s ings 16,

which press the projections 15 outward the tue of', the weight of the parts. The two rods 3, one on each side of' the machine, .thus inreality'always have the same incli nation, thou h in Flg. 1 they are shown atdifierent. incTin their.imovemcnts more clearl With the aid of the ratchet wheel 11, t e rods 3 can be. retained at an desired inclination."

- -Wh en' the she 8 is rotated, which can Ibcfdone by of one of the hand wheels 9 at either. ends-of the. machine,'the bevel gearing"7,.6 at each end of the shaft, causes a rotation of the two threaded sleeves 4,

whereby the nuts 5 upon the! same,iwhich the terminals of a rod orshaft 18 the machine, when the said frame-work Specification of Letters Patent. Patented Jllly 12, 1921. V

.lowe'ringmovement being continued in virations, in order to illustrate connecting them, are simultaneously raised or lowered. The two gearings andthe two sleeves are exactly similar to one another,

and moreover the gearings are so arranged that when one of the sleeves is rotated in one direction,'the other is simultaneously ro, tated -in the same direction, in consequence whereof the rod 18, whether it is raised or lowered, always performs parallel motion. This rod 18, which extends along the entire length of the spindle rail, and is situated at a suitable distance from the row of spindles, carries opposite each'spindle two holders19 of somesuitable construction, into which tubes easily can be inserted and from which the tubes easily can be removed. The two holders 19 in front of each spindle are placed diametrically opposite each other, and all the holders along the entire rod are so mounted in relation to one another that at the same time one holder is facing each spindle. In order to render such an adjustment of the holders possible, each end of the rod 18 is rotatably connected with its nut 5, and is moreover provided with a handwheel 20 and a double ratchet wheel 21, 22 with teeth in opposite directions, for which there are pawls 23, 24, carried by arms 25 projecting from the nut.

When the bobbins 26 in the machine have been filled, with yarn, the shifters, withthe aid of a hand-wheel 12, are moved into the positions shown at the left in Fig. 1 and Fig. 9, whereupon the shifters at'either side of the machine may be operated independently of each other. In moving the shifters into the position shown in Fig. 9, the rod 18 is brought down into its lower position, and the head 27 on each tube 28 is clasped in this position by a holder 19.

All the bobbins on the spindle rail can now be removed from their spindles by setting the shafts 8 in rotation with the aid ofthe hand-wheel 9 and thereby rotating the threaded sleeves 4,-.so that the rod 18 'is raised into its top position as shown in Fig. 10, when the under sides of the tube heads 27 are above the upper ends of the spindles 29. When the bobbins have been removed: from their spindles, the two shifters of the machine are brought into the position shown in Fig. 11 by rotatingthe hand wheel 12,

whereby the ropes 14 are unwound from.

their pulleys, the shifters being first moved outwardly by the springs 16 and afterward lowered by their own weight, and stopped after having moved so far outward that the rod 18 with the full bobbins 26 now carried bythe same, as well as the empty tubes 28 which have been inserted in the other holders 19, can be turned half a revolution without being hindered by the spindles29 (see Fig. 11). After thisj'evolution of the rod 18, the shiftersare again approached to r the 'spmdles, Fig. 12, by rotating the handwheel 12, whereby the ropes 14 are again wound up on their pulleys. The empty tubes 28 are now above the spindles 29, so that when the rod 18 is again lowered by rotating the threaded sleeves 4, the tubes are placed on their spindles, as shown in Fig. 13. As soon as the tubes have been placed on their spindles, the shifters are first lowered into an intermediate position, for instance into the position shown in Fig. 14 in dotted lines, in which position the rods 18 are moved to the other or outer ends of the threaded sleeves 4, whereupon the shifters are brought down into the position shown in Fig. 14 in full lines, in order to allow the bobbins 26 to approach the-spindle rail. While the shifters assume this position, the

tubes last mounted on the spindles are filled with yarn, and at the same time the full bobbins 26 in the shifter are removed by hand, and into the same holders from which they are removed, are inserted empty tubes, so that when the bobbins, which are being filled with yarn, are ready and the shifters are restored to the upright position, the empty tubes which are to be mounted on the spindles in place of the full bobbins are in place in the shifters. When the shifters are carried from their lowered position to the upright position, they are stopped, as in the case of the lowering, in an. intermediate position, for instance the position shown in Fig. 14 in dotted lines, the rods 18 being then moved down into their lower position close up to the spindle rail, in order that the holders 19, when the shifters are brought into the upright position, may approach and clasp the heads of the tubes on the spindles, as shown in Fig. 9. The shifters provided with empty tubes new again assume the positions which are-required in order to remove the full bobbins from the spindles and in their place to mount empty tubes, which operation is carried out in the manner above described. l v When the empty tubes are to be mounted on their spindles by the lowering of the rod 18, it is obviously of .the greatest importance that they be in line above the spindles. In

order to efiect the exact adjustment required, special. devices are provided. On the one hand the holders, which embrace the heads of the tubes and by which the bobbins are carried, are so arranged on the rod 18 that .the distance between adjacent holders is precisely equal to the distance between the spindles, whereby an exact lateral adjustment of the tubes is effected. In order that an exact adjustment may also be had in the transverse direction an arrangement is provided with the object that, when the rod 18 is turned from the position shown in Fig. 10

intothat. shown in Fig. 12, this'turn may be precisely To thee ds just mentioned the rod 18 is constructed in a special manner as illustrated in the drawing, where in 3 and 4 a form of construction thereof is shown. Fig. 3 shows part of the rod, viewed from the side, and Fig. 4 the same part, seen in plan partly in section. This composite rod, which in the above description has been designated generally as 18, which designation, however, is not used in these figures, consists of an inner rod 30, on, which are mounted alternately plates 31 and tube pieces 32 and 33 serving as distance pieces for the said plates. The plates 31 are arranged in pairs, and each pair forms such a holder as has been designated above as 19.. The plates in each pair are held spaced apart by a tube piece 32 of such length that the head 27 of a tube can enter between the plates and the tube be retained in the required position by the same, whereas the length of the tube pieces 33 is such that the tubes 27 carried by the plates are spaced apart a distance equal to the distance between the spindles. In order that the plates may assume a definite position on the rod without being able to turn on the latter, the rod is flattened along its entire length and the aperture 34 in the plates,

Fig. 5, is shaped in conformity with the cross I section of the rod 30. Ineach, holder the plates 31 on the sides facing each other are provided with grooves or recesses 35-into which enter the rings on the headsof the tubes, so that the latter can be securely held in the desired position by the plates, which are somewhat yielding. The recesses 35 are shown in Fig. 6, which is a section along the line 6-6 in Fig. 5. v

For the purpose of limiting the rotation of the rod 18, as mentioned above, to 180 40 there is provided in one or more places along the length of the rod a special guide, which consists ofa rod 36 hinged to the spindle rail and a corresponding sllde piece 37, (Figs. 3,

.4, .7 and 8) fitted into the rod 18. This slide piece, the length of which is equal to the length of a tube'piece 33, is provided with threaded side pins 38, which are of the same diameteras therod 30, which, where a slide piece 37 is arranged, is split transversely.

Atv the dividing points the ends of the rod 30 are threaded, and each ofthese ends together with the corresponding in 38 is screwed into an internally threade ftuibe pi'ece 32. In theslide piece 37 is arranged a "diametrical perforation 39, which is of the same di eter as the rod 36 and intowhich the lat er enters in order to serge as a guide.

Theslide piece is surroundedby a sleeve 40.

provided with an aperture for the rod 36 and a projection 41, in which the end of the rod 36 is intended tostop, whereby; the sleeve will be rendered stationary-when the rod 18 composed of the rods '30, thegtube pieces 32, 33, the holders, and the slide-pieces 37, is, rotated. It-will be readily'Iunderstood that bv this arrangement the required turning of the rod 18 180 is easily attained. When the shifter has been raised to the position shown in Fig. 10, the end of the rod 36 has passed entirely out of the slide piece 37, but is still in the projection 41, in consequence of which the sleeve will be stationary, while the rod .18 as well as the bobbins and tubes carried by the same are rotated from the position shown in Fig. 10 to that shown in Fig. 12. Only when the rod has turned 180 is it possible to move down the rod 18 and the empty tubes carried by the same from the position when these are mounted on the spindles, as-

well as for the full bobbins when they are 'removed from the s indles, whereby. these will obtain rectilinear movement and the rod '18 will be prevented from turning during the downward. as well as the upward movement.

Having 'now described my invention, what I claim as new and desireto secure by Letters lipltents t f 1. J a o appara us or s mmn and twisting ma hines, oppositely disposed threaded supports movable toward and away from the machine adjacent the spindle rail thereof, a holder rod extending between said supports and having its. ends engaging and movable" lengthwise on said supportsfrom end to end of the latter, holders on said rod, movable with the latter from end to end of said supports "and means for r0 tatin the holders.

2. n a dofiing ap aratus for sp twistirlig 151831111165, til e cgnzibinatiori tvsvit op: site is t rea e sup pivo Elly n gunted d gcent the ends o f the spindle n and.

rail of-the 11180111116, of nuts adapted to travel 2 lengthwise of said supports, a holder-supporting member attached to said nuts, hold- 'ers on .said member, and'means for rotating said holders. V f '3. In a dofling ap ratus for spinnin and twistgilig t hi ecogielinatlon 31st opi t s pp P tfll mounted adjacent the ends of the spin e rail of the machine, ofvnuts adapted to travel along said su ports, a holder rod havin its opposite on s jomrhaled in said nuts, olders carried by said forrotating to present the holders success; ely m proxlmity to the spindle rail. 4.111111 'dofli apparatus for splnmn 1 and twisting inac ifies, the combination wa upported holder rods at o posits i ..ip al v S sides 0 the machine, of a ulley ocated centrally of the machine, ca les extending and means from the pulley to the holder rods, and means for rotating said pulley to move the holder rods toward and, away from the spindle rails of the machine,

5. In a doffing apparatus for spinning and twisting machines, a cop holder support 1 a transverse opening therethrough, of a guide rod pivoted to the machine and slidably extending through the opening in said first mentioned rod.

8. In a dofling apparatus for spinning and twisting machines, theoo-mbination with a cop-holder-support comp-rising a rod having a transverse opening therethrough and a sleeve surrounding the rod and having an opening therein registering with the opening in the rod, of a guide rod pivoted to the machine and 'slidably extending through the openings in the sleeve and said first mentioned rod.

9. In a do-fling apparatus for spinning and twisting machines, the combination wlth a cop-holder-rod, of a perforated guide member having threaded ends engaging said rod, a perforated sleeve surrounding said member and having a projection extending therefrom, and a guide rod pivoted to the machine and adapted to reciprocate through said perforations, and to be retained in said projection.

10. In a dofiing apparatus for spinning and twisting machines, the combination wlth therefrom and each comprising a cop-holder rod, of cop-holders projecting parallel projecting plates havlng grooves therein. j

11. In a dofling apparatus for spinning and twisting machines, the combination with a pair of threaded sleeves pivotally mounted at each side of the machine, of means for moving said sleeves toward and away from the machine, a rod rotatably supported by the nuts at each side of the machine, pairs of oppositely projecting copholders projecting from each rod at intervals, each of said cop-holders comprising a "pair of recessed plates, and means for rotating said rods. n witness whereof I have hereunto set my hand in presence of two witnesses.

FREDRIK GRAF.

Witnesses G'ILLIS Y. LANDEBERG, V EMANUEL' JOHNSON.

a pair of 

